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Topic: Cooling fan and clutch question? (Read 2368 times)

I have seen that all of the early Chevrolets used the short water Pump through 1968 (except Corvette = through 1972) With this pump was I thought Always used a fan with 3" bolt spacing. Now I find out from some people that the 67-8 Z/28, as well as the L-78 used the later 3.25" spacing.?? is this true?

I had thought that spacing was not used on Chevrolet motors untill 1969.

3.25" is the spacing used for the later "long" water pumps.Are the water pumps different on those 2 - 67-8 Chevy applications, as to use a differnt fan and clutch.

I know that all the other motor divisions used the larger spacing, and Chevy was different. Why were these 2 applications different then the rest of the Chevrolet engine line?

First, take a look at this:http://www.camaros.org/coolingsystems.shtmlI realize this only addresses part of your question...I think Kurt can help you with the rest. He straightened me out on the 3 vs 3.25 spacing a while back.